I had the very same thing happen, and I think that the response is overly insensitive. To accuse the user of being irresponsible because Ccleaner destroyed the computer? There is an assumption that the components such as the registry cleaner, the basic cleaner, and the newer tune up are set for ultra conservative modes. The novice user selects the default mode because he does not want to chance making an error and then CCleaner ruins his operating system because of it? Sorry, but I'm not using Ccleaner ever again. It was too much work having to restore my computer after Ccleaner destroyed Windows 10. There is clearly problems with CCleaner. I know I would never run it again.